Abstract
Many theoretical approaches aiming to explain dark matter or dark energy predict variations of Newton’s law of gravity at sub-millimeter separations. In this low-energy domain, force metrology provides an alternative to astronomical observations and high-energy experiments in the search for new physics. The Casimir And Non-Newtonian force EXperiment (CANNEX) has been designed from the ground up to allow for metrological force measurements between truly parallel macroscopic flat plates in the separation range 3–30 micrometer. Benefiting from this geometry, the experiment could potentially reach sensitivities of [Formula: see text]nN/m2 for pressures and [Formula: see text]mN/m3 for pressure gradients. Achieving such precision would enable us to test a variety of non-Newtonian interactions and to unambiguously detect thermal Casimir forces at large separation. In this paper, we review the experimental setup together with proposed improvements, and give an outlook on potential measurements that will be performed once the setup has been rebuilt at its new location in Vienna.
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